Jet JTM-1254RVS, Operating Instructions Manual

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8.8 Feed trip cam lever
The Feed Trip Cam Lever (A, Figure 8-6) is located
behind Manual Fine Feed Handwheel (B). It engages the
overload clutch on pinion shaft when positioned to the
left.
The Feed Trip Cam Lever stays engaged until Quill Stop
(G, Figure 8-8) contacts Micrometer Adjusting Nut (F,
Figure 8-8) forcing it to drop out automatically, or until it
is released manually by pushing lever to the right.
Figure 8-6
8.9 Spindle speed control
While machine is running, turn speed control handwheel
(N, Figure 8-9) until desired speed shows on front plate.
Do not attempt to change spindle
speed unless motor is running.
8.10 Feed direction control
The Feed Direction Control (C, Figure 8-7) determines
whether power feed will move up, down, or not move at
all. The position of knob depends upon direction of
spindle rotation (see
sect. 8.2, Motor Direction Switch).
Position of the control may be changed with the system
stopped or running. If the control does not engage easily,
move fine feed handwheel (B, Figure 8-7) back and forth
to aid engagement.
If spindle is rotating clockwise, in is downfeed; out is
upfeed. If spindle rotation is counterclockwise, out is
downfeed; in is upfeed. Neutral position is between in and
out position.
It is recommended that Feed
Direction Control be left in neutral
position when not in use.
Figure 8-7
8.11 Coarse feed handle
The Coarse Feed Handle (D, Figure 8-8) is used for non-
precision drilling operations and for moving quill to a
specific depth. A return spring will retract spindle once
handle is released.
8.12 Quill lock handle
Rotate Quill Lock Handle (E, Figure 8-8) clockwise to lock
quill in desired position. Rotate handle counterclockwise
to release.
Figure 8-8
8.13 Depth scale and stop
Refer to Figure 8-8:
The Depth Scale and Stop are used in drilling operations
to set depth of drilled hole. The scale consists of a
Micrometer Adjusting Nut (F), Quill Stop (G), Quill Stop
Screw (H), and Scale (J).
The Micrometer Adjusting Nut (F) provides a positive stop
for quill travel. Push button (F
1
) and slide nut to general
position, then rotate nut to specific depth setting.
Graduations on micrometer nut are in 0.001-inch
increments.